Wordnet 3.0
NOUN (1)
1.
a now obsolete picture pickup tube in a television camera;
electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons;
[syn: orthicon, image orthicon]
WordNet (r) 3.0 (2006):
orthicon
n 1: a now obsolete picture pickup tube in a television camera;
electrons emitted from a photoemissive surface in
proportion to the intensity of the incident light are
focused onto the target causing secondary emission of
electrons [syn: orthicon, image orthicon]